| ALF | Alpetro Resources Ltd. | TSX Venture | Active |
| ALQ | Alpha Gold Corp. | TSX Venture | Active |
| AFM | Alphamin Resources Corp. | TSX Venture | Active |
| AOC.H | Alpha One Corporation | TSX Venture | Suspended |
| NPA | Alphinat Inc. | TSX Venture | Active |
| ALO | Alston Ventures Inc | TSX Venture | Active |
| ANG | AltaCanada Energy Corp. | TSX Venture | Active |
| ATI | Altai Resources Inc | TSX Venture | Active |
| AVX | Altair Ventures Incorporated | TSX Venture | Active |
| AHS | Alta Natural Herbs & Supplements Ltd. | TSX Venture | Active |
| APK.H | Altek Power Corporation | TSX Venture | Suspended |
| AFX | Alternative Fuel Systems (2004) Inc. | TSX Venture | Active |
| ARH | Altima Resources Ltd. | TSX Venture | Active |
| ATV | Alto Ventures Ltd. | TSX Venture | Active |
| ALT | Alturas Minerals Corp | TSX Venture | Active |
| AGX | Amador Gold Corp. | TSX Venture | Active |
| AMH | Amanta Resources Ltd. | TSX Venture | Active |
| AHR | Amarc Resources Ltd. | TSX Venture | Active |
| AGC | Amarillo Gold Corporation | TSX Venture | Active |
| AMT | Amato Exploration Ltd | TSX Venture | Active |
| AMB | Ambrilia Biopharma J | TSX | Active |
| BZA | American Bonanza J | TSX | Active |
| AJC | American Consolidated Minerals Corp. | TSX Venture | Active |
| AMK | American Creek Resources Ltd | TSX Venture | Active |
| AMY | American Manganese Inc | TSX Venture | Active |
| ANR.U | American Natural Energy Corp. US$ | TSX Venture | Active |
| BOE | Americas Petrogas Inc | TSX Venture | Active |
| ARG | Amerigo Resources J | TSX | Active |
| APM | Amerix Precious Metals Corporation | TSX Venture | Active |
| AMX | Amex Exploration Inc. | TSX Venture | Active |
| ABG | AMG Bioenergy Resources Holdings Ltd. | TSX Venture | Active |
| AMG | AM Gold Inc | TSX Venture | Active |
| AMU | AMI Resources Inc. | TSX Venture | Active |
| AMF | Amorfix Life J | TSX | Active |
| AEL | Amseco Exploration Ltd | TSX Venture | Active |
| ANX | Anaconda Mining J | TSX | Active |
| ANN.P | Ananda Capital Corp. | TSX Venture | Active |
| AAG | Andean American Gold Corp | TSX Venture | Active |
| AAU | AndeanGold Ltd | TSX Venture | Active |
| ADM.WT | Andina Minerals Inc wt ex 2jun2012 | TSX Venture | Active |
| AOX | Andover Ventures Inc. | TSX Venture | Active |
| ANP | Angiotech Pharma | TSX | Active |
| ALU | Anglo Aluminum Corp | TSX Venture | Active |
| ANB | Anglo-Bomarc Mines Ltd. (N.P.L.) | TSX Venture | Active |
| ACG | Anglo Canadian Oil Corp | TSX Venture | Active |